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Re: power connector fix
I did have the same problem with my laptop and I fixed it by resoldering the connector. It is not an easy task, mine was a Compaq presario also. If you do decide to do it, you will need to take apart the whole laptop, removing every screw, LCD screen, Keyboard, processor heatsink, motherboard, the whole nine yard.
Don't forget to :
remove all the hexagonal screws on each side of the serial/parallel/vga etc... connectors
remove the LCD display as soon as you can. that part is actually easy.
The keyboard need to come out before you can open the case, there is a few screws under it.
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Symptoms of a broken power jack 1. If you wiggle the power cord or the AC Adapter connector on the back of the laptop, the power LED and battery charge LED start to flicker. 2. Battery will not charge in the laptop. 3. Laptop runs fine off a charged battery. 4. With the AC Adapter connected the laptop appears to be dead. No power LED or battery charge LED activity. 5. Laptop randomly powers off without any warning.
If your laptop is out of warranty, then you can fix the problem by re-soldering DC-IN jack on the system board. If it
does the screen has power? even if it has blank/dark screen you can still tell if it has power. if it does try disconnecting and reconnecting its cable but you are going to open the laptop hardware. try cleaning the connector but if it doesnt work i guess you will have to buy a replacement. if it does not have power. you will still do the same thing. the connector could be disconnected.
If you remove the battery, does the AC Adapter power the computer? Does the laptop have a barrel type power connector? I have replaced several power connectors for broken center pin. Does wiggling the power connector affect the charging light?
sounds like the power connector (where you plug into pc) is going bad. try twisting / wiggling connector. pause for a few seconds between twists to give circuitry chance to reconize power input. sometimes there is a green led that will light up when power adaptor is inserted. you can use that as a reference.
If the battery is 2 years old, then buy a replacement battery, see if it charges. Portable batteries are good for roughly 300 to 500 recharge/discharge cycles before they begin to fail roughly 18 months. Dell warrants the Battery for 1 year, so there is no warranty on the battery. If a replacement battery doesn't charge, then the motherboard will need to be replaced. If under warranty, Dell will fix it, if not, motherboards are $100-150 on Ebay.
If you can't charge the battery and you know the battery is good, hook up just the ac adapter to verify that the laptop can turn on without the battery hooked up and if your laptop turns on then you know both are good.
At that point I would say since its not charging then it could be that the dc jack has some bad solder points on the bottom of it and need to be resoldered. Sometimes if the solder goes dry and cracks just a bit if can cause the adapter not to charge the battery.
If that doesnt fix the problem the the motheboard is bad and would need to be replaced.
Well, the battery is it's own separate module. The battery most likely will just pop out of the laptop wherever it is.
The AC cord is a power supply ran from a normal household outlet. It also charges the battery. So, you can both charge the battery and run the laptop at the same time. The battery is probably only going to be used on the run anyhow. :) So, you can just use the AC cord whenever you have access to an outlet.
Most of the time with laptops that wont charge the issue is at the connector either at the cord or where the connector is soldered to the motherboard.
Before you get to any of that please check the obvious first.
is the power supply plugged in, does it have it a green light, is it lit.
You can try taking the model number of your laptop and finding a replacement power cord like one made by targus.
if that doesnt do it, you will have to take your laptop to a qualified technician for repair.